rybu

Type	Post	Author	Replies	Last post
Open problem	Smooth 4-dimensional Poincare conjecture	rybu	1	3 years 46 weeks ago
forum topic	Maintaining questions in a subject area	rybu	4	14 years 45 weeks ago
Open problem	The 4x5 chessboard complex is the complement of a link, which link?	rybu	0	14 years 45 weeks ago
Open problem	Unsolvability of word problem for 2-knot complements	rybu	0	14 years 51 weeks ago
Open problem	Is there an algorithm to determine if a triangulated 4-manifold is combinatorially equivalent to the 4-sphere?	rybu	0	15 years 36 weeks ago
Open problem	What is the homotopy type of the group of diffeomorphisms of the 4-sphere?	rybu	0	15 years 36 weeks ago
Open problem	Which compact boundaryless 3-manifolds embed smoothly in the 4-sphere?	rybu	0	15 years 36 weeks ago
Open problem	Fundamental group torsion for subsets of Euclidean 3-space	rybu	0	15 years 36 weeks ago
Open problem	Which homology 3-spheres bound homology 4-balls?	rybu	0	15 years 36 weeks ago
Open problem	Realisation problem for the space of knots in the 3-sphere	rybu	0	15 years 36 weeks ago
Open problem	Slice-ribbon problem	rybu	0	15 years 36 weeks ago
Open problem	Smooth 4-dimensional Schoenflies problem	rybu	0	15 years 36 weeks ago

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